Probing axial quark generalized parton distributions through exclusive photoproduction of a γπ± pair with a large invariant mass

Duplančić, Goran; Passek-Kumerički, Kornelija; Pire, Bernard; Szymanowski, Lech; Wallon, Samuel (2018) Probing axial quark generalized parton distributions through exclusive photoproduction of a γπ± pair with a large invariant mass. The Journal of high energy physics, 11 . ISSN 1126-6708

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Official URL: https://doi.org/10.1007/JHEP11(2018)179

Abstract

Exclusive photoproduction of a γπ± pair in the kinematics where the pair has a large invariant mass and the final nucleon has a small transverse momentum is described in the collinear factorization framework. The scattering amplitude is calculated at leading order in αs and the differential cross sections for the process are estimated in the kinematics of the JLab~12-GeV experiments. The order of magnitude of the predicted cross-sections seems sufficient for a dedicated experiment to be performed. The process turns out to be very sensitive to the axial generalized parton distribution combination H̃u−H̃d.

Item Type:

Article

Uncontrolled Keywords:

generalized parton distributions (GPD) ; exclusive photoproduction

Subjects:

NATURAL SCIENCES > Physics

Divisions:

Theoretical Physics Division

Projects:

Project title	Project leader	Project code	Project type
Fizika Standardnog modela i njena proširenja-PhySMaB	Blazenka Melic	IP-2013-11-5169	HRZZ
Ruđer Bošković Institute: Twinning for a step forward of the Theoretical Physics Division-RBI-T-WINNING	Fabrizio NESTI	692194	EK

Depositing User:

Goran Duplančić

Date Deposited:

12 Jun 2019 11:52

URI:

http://fulir.irb.hr/id/eprint/4548

DOI:

10.1007/JHEP11(2018)179